[PATCH v5 2/6] power: add power sequence library

[Matthias Kaehlcke]

El Mon, Aug 08, 2016 at 04:52:07PM +0800 Peter Chen ha dit:

> We have an well-known problem that the device needs to do some power
> sequence before it can be recognized by related host, the typical
> example like hard-wired mmc devices and usb devices.
> 
> This power sequence is hard to be described at device tree and handled by
> related host driver, so we have created a common power sequence
> library to cover this requirement. The core code has supplied
> some common helpers for host driver, and individual power sequence
> libraries handle kinds of power sequence for devices.
> 
> pwrseq_generic is intended for general purpose of power sequence, which
> handles gpios and clocks currently, and can cover regulator and pinctrl
> in future. The host driver calls pwrseq_alloc_generic to create
> an generic pwrseq instance.
> 
> Signed-off-by: Peter Chen <peter.chen at nxp.com>
> Tested-by Joshua Clayton <stillcompiling at gmail.com>

Reviewed-by: Matthias Kaehlcke <mka at chromium.org>
Tested-by: Matthias Kaehlcke <mka at chromium.org>